Perhaps you'll tell me to read the manual, but I wondered: How do you encode
A = b = c
a < b < c
a < b = c
etc in content MathML?
In fact, I had a look at the manual and the closest I could find is
http://www.w3.org/TR/2009/WD-MathML3-20090924/chapter4.html#contm.nary.reln
Jonathan
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